ip6 • Dr. Waring on the 
If the angles are not right, they may eafily be reduced to 
them. 
4. The attractions of thefe furfaces, curves, &c. on a given 
point P may be deduced from the preceding principles of finding 
the attra&ions of each of the parts in the directions of the firft 
abfciffa, which paffes through the point P, the fecond ab- 
le ilia, and the ordinates, and then finding the integrals of 
thefe increments. 
From the method which determines the attraction of a body, 
furface, &c. on a given point can be determined the attraction 
of a body, &c. on any number of points, and confequently the 
attraction of one body, &c. on another, &c. 
It is fometimes advantageous to transform the firft abfeifs, 
that it may pafs through the point attraCh d . ' the abfciffae 
and ordinates, that they may be at lig.ii ... _ s to each 
other, &c. 
PROBLEM V. 
4 
1. Fig. 8. Given an equation expreffing the relation between 
the two abfeiffas AP and P p of a folid, and their correfpondent 
ordinates pm, or AP 7 , P f p\ and p' m ' ; to transform the firft 
abfciffa into any other L h. 
Let the abfciffa L h begin from a point L of the firft ab- 
feifla AP, and meet an ordinate pm in the point h; draw hp 9 
and let the fines of the angles P 'pm, P bp, and pVh ; LP h 9 
P/ 3 L, and PLZ?, be denoted refpeClively by r, s, and t, &c. 
r\ /, and P ; through a point h of the line P h draw p'h'm' 
parallel to pm, and L h = z 9 hh' = x, and h'm' = y : in the given 
equation for AP, Vp, and pm fubftitute refpeClively their cor- 
refpondent 
